Idle just started running high.
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Stage III
Joined: Nov 2009
Posts: 3
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From: Northern Virginia
Idle just started running high.
I've got a 2000 Dyna Superglide with SE exhaust, cams, and intake. Bought it last November and never had any issues. Last week the idle started running high around 1500+. I haven't changed anything on the bike. I don't think the hot weather would cause it to idle high. Any ideas before I start messing with the idle setting to lower it?
Ultimate HDF Member
Joined: May 2008
Posts: 6,642
Likes: 48
From: Ogden, UT
Check for vacuum leaks around the carb and intake.
Finding an air leak at the manifold is simple. All you need is a can of penetrating oil like WD-40 with the extended straw type nozzle attached. With the engine idling, direct a heavy spray of the penetrating oil at the manifold gasket area and base of the carburetor and also where the manifold joins onto the head. When the spray hits the area leaking, there will be a distinct change in the sound of the engine. If the air leak is major, the change in sound will be quite obvious. Smaller leaks may only create minor changes in the sound.
Finding an air leak at the manifold is simple. All you need is a can of penetrating oil like WD-40 with the extended straw type nozzle attached. With the engine idling, direct a heavy spray of the penetrating oil at the manifold gasket area and base of the carburetor and also where the manifold joins onto the head. When the spray hits the area leaking, there will be a distinct change in the sound of the engine. If the air leak is major, the change in sound will be quite obvious. Smaller leaks may only create minor changes in the sound.
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